Filter apparatus



June 2, 1942. s. PALKIN 2,285,048

FILTER APPARATUS Filed Dec. 2, 1940 2 INVENTOR S.Pa|kin g/ Lj ATTORNEYS Patented June 2, 1942 FILTER. APPARATUS Samuel Palkin, Washington, D. 0., assignor to Claude R. Wickard, as Secretary of Agriculture of the United States of America, and his successors in omce Application December 2, 1940, Serial No. 368,216 1 Claim. (Cl. 210-153) (Granted under the act of March 3, 1883, as

amended April 30, 1928: 370 O. G. 757) This application is made under the act of March 3, 1883, as amended by the act of April 30, 1928, and 'the invention herein described and claimed, if patented, may be manufactured and Between the bottom 1 of the tank and the filter unit 8, there is disposed about the outlet pipe 14 a plate ll, sufiiciently thick to elevate, and sumciently wide to "support, the filter unit on said bottom. Between the plate I! and the bottom of 55 the tank a cloth washer I8 is disposed, the function of which is to filter any material passing into the pipe l5 from the space between the said plate and the bottom. The weight of the filter used by or for the Government of the United 5 unit upon the plate ll provides a uniform pres- States of America for governmental purposes sure contact between the bottom of the filter unit without the payment to me of any royalty thereand the top of said plate, and also between the on bottom of theplate l1 and the washer l8, and This invention relates to devices suitable for the washer l8 and the bottom 1 of the tank. filtering, and especially those which are useful in 10 Consequently, not only must liquid entering the filtering viscous materials. such as oleoresin. drain l5 from the space between the bottom 1 More particularly, this invention embraces cerand the plate ll filter through the washer ll, tain improvements in my prior invention, disbut also any liquid entering the drain l5 from the closed in United States Patent No. 2,198,175. space between the plate I! and the filter unit One of the objects of this invention is the pro- 16 must pass through'the filter cloth on the bottom vision of means which will facilitate the removal of the filter unit so that those portions of the of the residue material from the filter surface. liquid which escape the filter unit in this way Another object of this invention is the prowill be equally as well filtered as those portions vision of means which not only permit the easy entering normally through the leaves 9 and I0. removal of the filter cake or residue, but also 20 Between adjacent vertical leaves 9, there are permit the easy removal of the filter units withdisposed spacers l9 which hold these leaves in out disturbing other parts of the filter system. position and in alignment. These spacers also Further o j s nd dv nt es of the present facilitate removal of the residue or "filter cake", invention will be apparent from the following since the spacers become embedded in the cake description taken in connection with the accomand reenforce it so that the entire cake can be panying drawing, in which drawing: removed in one piece. The vertical filter leaves Figure 1 is a side elevational view. partly in 9 and the spacers H! are held together as a unit section. f a fil r sys i us n y v by means of a plate 20 disposed on top of said tion; and leaves, said plate having downwardly extending Figure 2 is a section along the line 2-2 of flanges 2| at its ends contacting the'outer sides Figure of the outer vertical leaves 9, substantially as Referring with more particularity to the drawshown. The plate 20 is held in position by means ing in which like numerals designate like parts, of straps 22 disposed about said plate and the the filter system comprises a reservoir or tank horizontal filter leaf Ill. The plate member 20 5, provided with apertures 6 through the bottom may be provided with apertures 23 between the 1 there f. n perture for each filter unit. The vertical leaves 9 so as to permit a better fiow of filter unit is designated generally at 8 and conthe material from the top of the tank to the space sists essentially of a plurality of vertical leaves between the leaves 9. The straps 22 are provided 9 and a horizontal leaf I0. Eachof these leaves with handles 24 to facilitate removing the entire comprises a corrugated plate core -I I, a screen I2 40 flIter u it; from t t 5 encasing the core, and a filter cloth I3 encasing The plate 20, in addition to its function above the screen. The space in the cores of the vertical described, also acts as a separator between unleaves 9 drain into the core of the horizontal leaf filtered liquid'and the residue or filter cake about In, which is provided with a downwardly ex n the filter areas. In operation, as the filter unit in outlet P p Each aperture 5 1S e functions, the filter cake builds up about the cally connected to a pipe l5 feeding into a manifilter leaves until the entire space between the fold drain pipe 6. an the outlet p I4 is p y vertical filter leaves 9 is filled, the liquid being disposed through the aperture 6 and projects into held at a level above the filter leaves 9. When the pipe I5, the pipe l4 being of a smaller ou i this residue or cake builds up to the top of the diameter than the inside diameter of the pipe leaves 9, additional filtering is too slow for practical purposes and the filter unit must be removed and the filter cake recovered. An outlet pipe 25, having a valve 26, tapped into the side of the tank at about the level of the plate 2|! is used to drain on the unfiltered liquid, leaving only the residue on the filter units. The filter units are then removed by simply lilting them out, after which the straps 22 and the plate I! are removed. The filter units are then cleaned of the residue or cake and the entire unit reinserted in the tank ready for continued use. The decanted, un-

filtered liquid is then replaced in the tank and additional liquid to be filtered is added to a point above the plate 20.

Having thus described my invention, I claim:

A filter apparatus comprising a tank for receiving material to be filtered, filter units in said tank, each unit having a plurality oi filter leaves vertically disposed in horizontal spaced relation, each leaf comprising a plate core and a screen encasing said core, spacers removably disposed between the adjacent filter leaves to hold them in vertical alignment, a horizontal plate secured adjacent to the top of said leaves, an outlet pipe for said filter unit extending vertically from he bottom thereof, said tank having an apex-Pare through its bottom, the lower end of said outlet pipe being removably disposed in said aperture, a discharge pipe below said tank, said aperture being connected to said discharge pipe, 9. plate about said outlet pipe for supporting said filter unit on the bottom of the tank, and means between said supporting plate and said tank for filtering material passing therebetween.

SAMUEL PALKIN. 

